Love your dogs, they look great fun 
The first picture is nice, framing is alittle off so maybe could be cropped abit. The second picture is slightly out of focus on the boxer, so would maybe benefit from an aperture change to get them both sharp. Shame you've missed the front off the lab. I'd crop it on the vertical sides to even it out abit and give a nicer picture.
You hadn't put if editing images was ok so I've not reattached a copy to show what I mean (option is in user profile if you were happy for members to edit and repost though).