I do not see anything wrong, since since the pet system came out, if one managed to keep a pet alive at low level for more than 1 year and then started to raise it, it increases +0.1 for every 100 days alive (this it's from before). What happens now is that recently some are finding out about this and they want to blame the new system that changes the dopes in order to have a better pet. Also not to have a pet with 30 hp means that it is good, this should be if or if type Legendar, Prismathish, …