Yes yes!! We got a pup a week before the Covid shut down. He's now 5, and a good boy, but very reactive to other dogs especially, and people walking by. I actually stopped walking him because it was too stressful for the both of us. Anytime anyone came unsuspectingly around a corner, poor dog would go nuts. WE got cornered by a neighbor once, who had no dog sense. She totally trapped us. Our dog was going beserk. I actually escaped from this situation by going through the middle of another neighbors yard. Now his playtime and exercise time is in the backyard. With all that said, we have him on a couple supplements for calming. Our vet recommended them. He's been on them for a couple years, and they do make all the difference. He's a much calmer, happier more playful dog. He's even fine with company in the house. (Still reactive to other dogs though) He's not as big as your dog, he's 78 pounds. I highly recommend these products.
Here are the products: Both are non prescription.
VetriScience Composure Calm & Confident Clinically Tested Chicken-Flavored Chews Calming & Anxiety Supplement for Dogs, 60 count Our dog gets two in the morning and two in the evening. If he's going to the vet he gets more on top of that. No drugs - all natural. Mostly B vitamins, theanine and Colostrum. You can see calming effects right away.
Purina Pro Plan Veterinary Diets Calming Care Liver Flavored Powder Calming Supplement for Dogs, 30 count - This is powder that goes in the food once a day. It takes 6 weeks to see much difference. This is a pro-biotic, also no drugs in it.
Both have been worth their weight in gold. We are all happier with these products on board. Check it out.