My young Holland Lop (about 6/7 months) is very very thin. She's skin and bones. She has pellets and hay daily and I give her fruit and veggies occasionally. Yet she's getting very very skinny. I'm afraid she won't last a lot longer if she gets any thinner. She doesn't seem very interested in her pellets anymore but she's happy to take grass and apples. Is there a certain food that will help her put on weight quickly? And is there a way I can encourage her to take interest in her timothy pellets again?