...one of the things about taking in strays in general...you rarely know their background, where they've been, etc. This is another level of not knowing, when they disappear and come back.

Yes, the being skinnier part is a bit strange.

I agree. I'm hoping that he just stays now.

Thank you, it would be great if they all continue to get along.

Thanks! After thinking of names before he disappeared, that one just came to me when he returned. :-)