Any yaoi with a dog? Like, an actual dog. Please don't give me yaoi where they have actual...

http://www.mangago.me/read-manga/walking_with_you_junko/
http://www.mangago.me/read-manga/pochi_to_tama/
The first one is an incredibly cute shounen ai, but there's also an incredibly cute pomeranian near the end

TxS

http://www.mangago.me/read-manga/koukyuu_no_arika/

I totally read your question incorrectly the first time. Thank goodness I reread it before posting!