A lot of dogs that aren't housebroken or change homes find pottying outside a little intimidating at first and are just more comfortable "going" indoors. Slowly, you can change that. I start with a good schedule, predicting when he needs to go and taking him out every 15-30 minutes all day and all evening long for a month. I just give over to housebreaking the dog and all else kind of goes on hold.
In addition to the very frequent sessions he can come to count on, give him longer sessions outside if he doesn't go right away, watch him like a hawk once he is inside again & once he starts sniffing around or looking about - whatever his normal body language is B4 going, that's your signal to take him out, even if you've just come in from outside. If he doesn't start playing right away or go lie down and if he's still up and walking around after a trip outside, you must watch his every move & take him out again before he starts to go inside. Make a regular feeding, grooming, exercise, play schedule for him so you can know when he'll likely want to go and take him in advance of his need by a couple of minutes.
Lots of patience is required when waiting outside for a new puppy or new adoptee to go. No doubt about it, if you wait with him outside until he has to go, he will. This is where your determination to housebreak at all costs vs. someone who is trying hard will tell the tale! Only the truly determined can hold out for the 3-hour "go" session! I'm one of the first kind - I'll wait all night for a dog to go outside. And then we treat/celebrate big, big time! A few of those sessions and the dog comes to know we are going to be out there no matter what so he might as well go and get it over with sooner rather than later. Even a puppy will eventually get bored outside & want his toys, his water, his bed - in short, he'll want back inside, if nothing else, for the change. Uh-uh! Not until he goes! I'm far more determined than my dog is so eventually he learns this. And, in the end, these dogs come to love to do their business outside where it's more natural for them to go.
But he's likely trying to hold it until he's more secure and things are more familiar with him so you are just going to have to take a book or your iPad out with you and stay out there until he goes. Then give him a lovely treat and celebrate his big achievement, take him in and watch him until he settles down. I crate-trained my last two Yorkies very successfully using this method and both were totally clean in the house. I only put them in the crate when I couldn't have my eyes right on them as when I had to leave the room, do some chores or run an errand; otherwise, the dog was out in the house with me and being watched, taken out every 15 - 30 minutes all day and all evening long until he got the idea the outside yard was friendly and the best place to go potty, leaving all the "lovely" odors out there for the whole world to enjoy sniffing!!!! Once they prefer to potty outdoors, they will hold it for hours for the high privilege of getting to mark their outdoor territory for other dogs in the 'hood to smell! So this part requires a whole lot of time and patience but in time he'll get the idea where he needs to go and will also highly desire to go there.
I think your freefeed guy is going to have to have his food taken up to prevent new brother from eating it for now, otherwise your new guy will weigh twice his weight soon, unless you want to work your bottom off trying to teach the new guy to stay away from that full bowl and good luck with that! In time, maybe you can gradually work it out that both become freefeeders without the newbie overeating as he adjusts to how his brother is doing it. Some dogs do learn to free feed if another in the house who is the leader freefeeds and they want to follow in kind. Only time will tell that.
__________________ Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |