Freeze-dried raw food is raw meat with the water removed, so the handling rules are raw-meat rules plus a rehydration step. Mix 1 part freeze-dried food with 2 parts water by volume, use water below 40 C, let it stand 5 to 10 minutes, and feed it within 30 minutes. Keep the opened bag sealed at 20 to 22 C and finish it within 30 days. A 10 g scoop plus 20 mL of water gives about 30 g of food at 65 to 70 percent moisture.
1 to 2 by volume, and weigh it once
Volume ratios are easy to get wrong because freeze-dried pieces pack differently. The 1 to 2 ratio is 1 part food to 2 parts water by volume, so 2 tablespoons of pieces take 4 tablespoons of water. By weight it works out closer to 1 g of freeze-dried to 1.8 to 2.2 mL of water, because the food is only 2 to 5 percent moisture and the finished bowl should be 65 to 70 percent. Weigh the dry food on a 0.1 g scale for the first week, note how much water the cat actually accepts, and then use the scoop. Too little water leaves hard centers that a cat will pick out and leave; too much turns it into soup that most cats refuse after 2 meals.
Water below 40 C, and why not hotter
Use water at 30 to 38 C, and treat 40 C as a hard ceiling. Warm water speeds rehydration from 10 minutes to about 5 and raises the smell, which matters for an older cat with a dull appetite. Above 40 C you start losing thiamine and other heat-labile vitamins in a food that was never formulated to be cooked, and you also push the surface of the food into the range where bacteria multiply fastest. Never use boiling water to 'make it safe': 100 C water poured over 10 g of cold food drops to 60 to 70 C within seconds, which is hot enough to damage nutrients and not hot enough to reliably kill Salmonella throughout the piece.
30 days after opening, sealed
An unopened bag keeps 18 to 24 months at 20 to 22 C. Once air is in the bag, oxygen and humidity do the damage, and the practical limit is 30 days at room temperature, 60 to 90 days if the bag is kept in the freezer at -18 C and portioned cold. Do not store the open bag in the fridge: every time it comes out, condensation forms on the pieces and the surface goes from 3 percent moisture to a wet patch that grows bacteria. Squeeze the air out, clip the bag, and keep the desiccant packet in. A bag that smells sour, feels tacky or has clumped pieces goes in the bin.
Temperature and time by stage
| Stage | Temperature | Time limit | Container |
|---|---|---|---|
| Unopened bag | 20 to 22 C | 18 to 24 months | original sealed bag |
| Opened, room temp | 20 to 22 C | 30 days | clipped bag with desiccant |
| Opened, frozen | -18 C | 60 to 90 days | airtight box |
| Rehydrated, uneaten | 4 C | 24 hours | covered glass bowl |
| Rehydrated, in the bowl | 22 to 25 C | 30 to 60 minutes | ceramic or steel bowl |
The last 2 rows are the ones people break. A bowl of rehydrated raw food at 25 C is a bacterial culture after 2 hours, and 30 to 60 minutes is the honest window for a cat that walks away and comes back.
Three Salmonella steps that actually cut risk
Step 1 is a dedicated bowl, board and spoon used for raw food only, washed in water at 60 C or hotter with detergent and dried, never just rinsed. Step 2 is hands and counters: wash for 20 seconds after touching the food, rehydrate on a tray rather than the counter, and wipe with a fresh cloth, because the sponge is the usual transfer route to human food. Step 3 is temperature control: rehydrate with water below 40 C, feed within 30 minutes, chill leftovers to 4 C immediately and throw them out after 24 hours, never refill a bowl that has been sitting out. Freeze-dried food is not sterile; the drying step lowers the bacterial load but does not remove Salmonella, and cats can shed it for weeks without looking sick.
Who should not be fed freeze-dried raw
Households with a child under 5, a pregnant person, or anyone on chemotherapy or immunosuppressants should not handle raw pet food, because the risk is to the people first. Cats with chronic kidney disease, a cat on steroids, a kitten under 12 weeks and a cat with a history of pancreatitis are also poor candidates. If the cat is on a wet diet already, the moisture and cost math in wet versus dry food usually argues for canned food; freeze-dried is a convenience format, not a nutritional upgrade.
Switching without a hunger strike
Start with 1 part freeze-dried to 4 parts water for 3 days so the texture is closer to pate, then move to 1 to 3, then to the full 1 to 2 by day 7. Offer 10 g of dry product per meal for a 4.5 kg cat, which is about 35 to 40 kcal, and keep the rest of the day's calories from the current complete food. A cat that refuses the wet version will often eat the pieces dry, which defeats the purpose; do not leave dry pieces out for more than 30 minutes either. Full transition over 10 to 14 days is fast enough for most cats and slow enough to catch diarrhea at 24 to 48 hours.
Signs of spoilage and when to call the vet
Vomiting within 1 to 2 hours of a meal, diarrhea at 6 to 72 hours, refusal to eat, fever, or blood in the stool all warrant a call. Salmonella in cats is often mild but a kitten or an older cat can go downhill in 24 hours. Bring the bag lot number to the visit; recalls are lot-specific, and a photo of the label saves a second trip. Compare any new protein or treat against the toxic food list before the first bowl, since raw feeders add more odd items than kibble feeders do.
Six steps for a safe bowl
- Portion 10 g of freeze-dried food per meal on a scale for the first week.
- Add 20 mL of water at 35 to 38 C, never above 40 C.
- Wait 5 to 10 minutes, stir, and check for hard centers.
- Serve in a raw-only bowl and pick it up after 30 minutes.
- Clip the bag, keep the desiccant, and write the open date; discard at day 30.
- Wash bowl, board and hands at 60 C water or 20 seconds of soap before touching anything else.
The 1 to 2 ratio, water under 40 C, 30 days after opening and 3 cleaning steps are the whole system. Get those 4 numbers right and freeze-dried raw is a manageable convenience food; skip them and it is a raw meat bowl at room temperature.
Frequently asked
Can I feed freeze-dried food dry instead of rehydrating?
You can, but you lose the main reason to buy it. Dry pieces are only 2 to 5 percent moisture, so a cat eating them dry takes in almost no water with the food, and cats on dry formats already run short. Rehydrate at 1 part food to 2 parts water below 40 C for 5 to 10 minutes, and if the cat refuses, go 1 to 3 for a week first.
How long does an opened bag really last?
Thirty days at 20 to 22 C in a clipped bag with the desiccant, and 60 to 90 days if you freeze it at -18 C and portion from frozen. Do not keep it in the fridge, because condensation wets the pieces every time the bag comes out. Write the open date on the bag and bin it at day 30.
Is freeze-dried raw safer than frozen raw?
It is lower risk, not zero risk. Freeze-drying removes water and lowers the bacterial load, but Salmonella can survive, and the food is still raw. The same 3 rules apply: dedicated bowl and board washed at 60 C, 20 seconds of hand washing, and strict chilling with a 30 to 60 minute bowl limit.
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