eating habits

Hi all! Been a lurker for a while and about 4 weeks ago my fiance and I finally got our kitten! His name is Virokketh (Viro for short) and he's my precious blue prince. I love him so much! I do have some concerns though. He's 17 weeks old but I fear he's not eating enough. He was 3.5 lbs when he...

Have you found that once a Sphynx reaches one year old eating habits change ? That is rather than eating all food at once might turn into a grazer ? Also not interested in the same breakfast food every day but will eat a tin of something else (which I needed to do to make sure she had...