Not sure what to do here (this is all about biological functions!)

Mac hasn't peed in 24 hours.

I fed him in the garage and left him there hoping he'll go in there, by himself. I feed all the dogs in the garage. Brett and Thor together and the foster separately. Mac will need to be fed twice a day in a weight gaining effort. Brett will often 'go' in the garage. His ADD interferes with him going when he's outside. He pees, but when it comes to the other, he will often go so far as to make like he's going to drop a load, then smell something or see something and stand up. So frustrating. More so in the rain or cold.

Back to Mac. Being a farm dog he's used to just going off to do his business. Having a fenced yard would be better here, but I don't have one of those. He didn't go during the transport so before we even went into the house I took him into the park. He's really good on a leash, but for this purpose he stays too close. He's not interested in sniffing the trees or the long grass around the creek.

Okay. I'll bring him in and give him some water and take everybody for the walk around the park later. 

Two hours later we're all out there walking. We're in the thick of a heat wave with intense humidity. When we first got him, I stood talking to Mitzi for about 15 minutes and my clothes were sticking to me.

To walk the entire park with dogs it takes 20-30 minutes depending on the dogs, really. Brett pulls the entire way as if to say, I'm going to keep trying to see if I'm still hooked to this leash. Thor doesn't pull, but wants to smell everything and pee many times. Both Brett and Thor took care of both jobs. Mac walked and even stepped out away from me, but often looked confused. Every other foster I've had, always ended up peeing after one of the other dogs. Mac doesn't even sniff at it and never went.

Later inside, Thor barked at something, Mac stood up and went down the hall. I gently called him back to me and he came toward me, cowering, and then peed on the carpet in front of me. This was so sad. It tells me he's been abused in some way. I have not had to be firm with him in any kind of way. He is such a sweet dog, shy and very responsive to the lightest call. And so loving.

I took him out with the expandable leash, thinking to give him more room to roam. He was fearful of the sound it made when it would suck back into the casing. Even laying down at my feet and rolling over when I tried to show him the case. So I pulled it out all the way and locked it. He didn't really like dragging it but quickly got used to it. But still not even interested in peeing.

I switched to the tie out. I have a 30 foot cable. I hooked him up to it and took Thor with me to 'show' Mac what to do. Still nothing. I brought Thor back and took Brett. Nothing. 

Woke up at 7:00 this morning. No 'accidents'. I took Mac out on the cable again. Stayed out there in the park for a half hour. Nothing.

So now he's in the garage for a bit. We'll see. How long can he hold it???????????????