I'm a relatively new cat owner, but I do a lot of reading. I adopted two 6 month old sibs (male and female) in December, and they're wonderful kitties, however, the female is tiny (about 5 lbs) and has a voracious appetite! I mean, she ALWAYS wants to eat - and I feed her a lot. Problem is, she doesn't gain weight, or grow - she just eats! I try to feed her wet food all the time, but she loves the kibble too, so I give her a little of that as a treat. I also give her boiled chicken, and turkey (soup stock). Anyway, long story short; I am worried that the little female may have HT. I've read that it usually occurs in older cats. Should I take her to the vet, or does this sound normal? Thanks for any advice...