TL;DR: A cat failing to gain weight for one week is a medium-priority concern that usually requires a veterinary appointment within 48 to 72 hours, unless accompanied by severe symptoms like lethargy or a total refusal to eat.
What does it mean if my cat or kitten is not gaining weight?
- In growing kittens, a week of weight stagnancy may indicate they aren't absorbing enough nutrients or are burning calories too quickly.
- In adult cats, weight issues often point to underlying health problems such as dental pain, metabolic shifts, or intestinal parasites.
- High stress levels can also act as an appetite suppressant, preventing healthy weight gain.
Is it an emergency if my cat has not gained weight in a week?
- The urgency level for a cat not gaining weight for one week is Medium; it is typically not an immediate life-threatening crisis.
- You should schedule a veterinary appointment to occur within the next 48 to 72 hours.
- Seek immediate urgent care if the lack of weight gain is accompanied by severe lethargy, persistent vomiting, or a total refusal to eat for more than 24 hours.
How does taking a photo of my cat help with veterinary triage?
- Capture a clear photo or video of your cat from both a side profile and a bird's-eye view (looking down at their back).
- These visuals allow a professional to assess your cat's Body Condition Score (BCS) remotely.
- Vets use these images to check the visibility of the ribs, the tuck of the waist, and the prominence of the spine or hip bones.
- Visual data helps determine the severity of the weight issue more accurately than a simple weight measurement alone.
Clinical Context (Merck Veterinary Manual)
In middle-aged cats presenting with a failure to gain weight, consider that they are at increased risk of developing obesity, while older cats often have a difficult time keeping weight on. If inappetence is present, rule out underlying disease conditions or environmental stresses such as unacceptable food substitutions, moving to a new household, loss of pets or family members, boarding, accidental confinement, or an indoor-only cat being lost outside. Hepatic lipidosis should also be considered. Metabolic supplements that may improve recovery include taurine (250-500 mg/cat/day), L-carnitine (250-500 mg/cat/day), vitamin E (10 IU/kg/day), and potassium gluconate (if hypokalemia is persistent).
Chapter: Gastroenterology, Nutrition
Source: The Merck Veterinary Manual, 11th Edition (Page 458)