Len aka Redial
I have had Basenjis since 1973, and done the apprenticeships of handling, showing, stewarding, and since 1990 judging hounds. I have four at home, one of each colour, and two boys and two girls. I am no longer breeding, but I have learnt a lot from my Bs.
Yes, a change of scenery will help, and help you too. A walk with new smells is always good, and keeping him on lead will be good for both of you. When your exams are over, or soon in the white stuff you call Winter, enroll him in dog obedience class, and you will get benefit for him and you. It is a good age to introduce him into obedience, you will learn a lot about yourself, and him, with a bit of proper instruction.
keep smiling in this stressful time of exams.
Have a look at Wikipedia for osteoporosis. The article is about humans, but, nevertheless, it gives a better definition of osteoporosis, causes, treatments, and outcomes. In older females, it can be associated with de-sexing, and the loss of estrogen. Take her to a knowledgeable vet, (some vets may have a preference for this type of illness). And see what they recommend. make sure you go with a list of all your questions, so that you do not forget to ask them the questions that are important to you. Good luck.