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Will my underweight rescue kitten have health issues growing up?

Updated On September 23rd, 2025

Hi, I have a kitten that is seriously underweight, he was at 59 grams when I found him and today he is at the 90grams mark (after 4 days). He is about one week old since he still had his cord attached and fell off yesterday. I'm feeding him petlac formula (about 3-5 ml) every two hours. Is there going to be any type of repercussion as he grows older? Any kind of health problem I could encounter?

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on July 22nd, 2018

He is not so far away from his normal weight,, actually. Count 100g/per week. So if he is a week old and weighs 90 g, that would still be ok, especially since he may not have been fed for a day before you found him. Keep feeding him kitten milk (pet-lac), as much as he wants, and keep him warm. Do not forget to stimulate his genitals and anus after feeding so he urinates and defecates and keep him clean (use a moist warm paper towel or tissue to rub gently, like a mother cat's tongue). If he is healthy, ie does not have any congenital conditions, he should grow normally. If you have any other cats in the household, it might be a good idea to let them interact with him, you might actually find a mama that way who may not have milk, but takes on the hygiene and babysitting and eventually teaching him to be a cat! It is very rewarding to raise a kitten! Enjoy!

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