My wife and I have two cats, a black one who is two years and a white/grey that is over a year. The black cat mainly eats moist food, but will eat hard food as a last resort. The white/grey cat mainly eats hard food, but will eat a little bit of the moist food.
They both sleep a lot, and run around chasing each other quite a bit, but here's the thing...while the black cat is still a normal size for a cat, the white/grey cat has gotten huge. Her head is about the same size as the other cat's, but her body is at least one and a half times as big as the other's.
We do leave a bowl of hard food out for them to graze on, but we only put out moist food out twice a day (once if the morning food isn't gone). Is this just a diet thing or could it be something else?

Thanks.
Are there any other symptoms other than the cat is getting heavy?? If not, you may want to eliminate the availability of the dry food and feed dry food and canned food twice daily. Also, you can switch to lighter variety of foods for the heavy cat.
Gail
We have looked at symptoms of underactive thyroid, and this might be the case since she is acting a bit more lethargic than usual (she is sleeping now) and definitely seeks out the warm places to sleep. She sometimes gets too warm sleeping next to the radiators. Can't really tell if her fur is dry, but it's never really lost the kitten fluffiness...she doesn't have the sleek fur of the black cat.
we are going to give a try to having the food available onl at certain times of the day though.
thanks
Nope, cats don't become ****thyroid, only ****thyroid. The only cases I know of for a cat to have an underactive thyroid would be post-thyroid treatment (to combat overactive thyroid), when the levels drop too much. IOW - an underactive thyroid could be secondary to something else, but wouldn't occur on its own. (Yes, w/ people it happens, but not w/ cats.)

If you think she's just too overweight & is acting kind of lethargic, the best bet would to have your vet take a look, if s/he hasn't already. Even if nothing's wrong - other than being overweight, the vet could probably give you advice on a diet.
Cathy

"Staccato signals of constant information..."
("The Boy in the Bubble") Paul Simon
Cathy..I do have a cat that is hypothyroid and takes her pills everyday.She gets blood tested every year also. It is very rare but it can happen.Emotion: smile

Leslie
"you can tell alot
about a people or person in how they treat animals"
Hmmm... I may may Google this later.
Cathy

"Staccato signals of constant information..."
("The Boy in the Bubble") Paul Simon
Btw , I also had a hypothyroid cat who took Thyroxin every day to correct it, but it was due to a latent side-effect of hyper-T treatment (thyroidectomy; she couldn't stay on Tapazole due to a liver problem).

Cathy

"Staccato signals of constant information..."
("The Boy in the Bubble") Paul Simon
Cathy..Squeeks is 11 years old and was diagnosed with it when she was 2years old. She also has alot of minor genetic problems and the vet figures that the hypothyroid is one of them. The vet was shocked that she tested hypo because you are right that it is very rare in a cat. She takes Soloxine every other day to control it and gets blood work done every year to make sure that nothing has changed. If you find a good link on it. I would appreciate if you could send it to me...Thanks:)
Leslie
"you can tell alot
about a people or person in how they treat animals"
I also have two cats brother and sister. The female is over weight and the boy is normal. The females head is the same size as the boys shes just large and her head seems to be disproportional to her body.