This is what I did with a onsie when Roxy was spayed recently.
I got the Gerber Onsies at Walmart... pkg of 5. Ones that snap in the crotch w/no legs in them - a
[COLOR=green! important][COLOR=green! important]pullover[/COLOR][/COLOR] style. Put the Onsie on backwards so that the front of the
[COLOR=green! important][COLOR=green! important]shirt[/COLOR][/COLOR] is on her back.
But first cut directly below the snaps on the back side a hole large enough to allow her to pee/poop. Cut the hole just long enough to clear the way to potty. Place & snap the onsie just before the tail. She should do very well with this.
[COLOR=green! important][COLOR=green! important]Roxy[/COLOR][/COLOR] never did end up peeing or pooping on the onsie.
Roxy is 6.7 lbs & about 11" long from the neck to front of the tail. I had to get her the 8-12 lb size onsie for her. Others have been able to use the premie or newborn size. Depends on size/length of your dog. Roxy didn't even know she had stitches. The onsie has worked like a
[COLOR=green! important][COLOR=green! important]charm[/COLOR][/COLOR]. If weather had gotten warmer I would have cut a few circles in various places in the shirt part for a little more ventilation, but it didn't get that warm. You could also cut the
[COLOR=green! important][COLOR=green! important]sleeves[/COLOR][/COLOR] off too. The onsie was loose enough there was air flow in the belly area. Thanks to whoever suggested the onsie! LUV it & so did the vet! She had never seen this idea before.
Granted this was for a female, but you may be able to cut a different version of this for your male. The onsie was sure a better option than the collar. Some people didn't make any cuts & just unsnapped to let them potty, then resnapped when done. Not practical in your case with working.