Question

After losing my husband two years ago, I adopted a girl and a boy kitty, both just under the age of two. They were total strangers to each other, but soon warmed up to each other. They clean each other, the boy chases the girl all over the house, and it can be a real hoot watching them. They really have adorable personalities and I've grown to really love them. They're my adopted "children." However, the past couple of weeks, my boy has started hiding under my bed for no apparent reason. And sometimes, he even runs away from me. I have, at times, given him a scolding for hurting my girl because he is bigger than her and I don't like to have her cry because he's overdone it. But I've never had him behave like he's been doing lately, especially hiding under my bed. He hasn't even come out to sleep with me and the girl, which is highly unusual. I'm truly heartbroken over this change in him and wonder if I should take him to the Vet because he might be sick. He is eating, drinking and using the litter box, so at least that part seems to be normal. Any words of advice would be welcomed. Thank you!