Jennie, it may sound cliche', but you WILL know when the time is right. I too think I would give him a chance to know love (even if only for a weekend). But if you already think he is "not himself" I would not postpone the inevitable too long. I don't know about you folk, but I truly believe an animal can feel emotional pain (like not knowing why he feels badly, not being able to do what he used to do, etc)

I think I feel the need t go hug a few kitties.

{{{{{HUGS}}}}}