First thing I want to say is that relocating to Addis will be a huge readjustment for you and your family.
Addis is a great place to raise your baby boy. we have some really good day cares and I'd be happy to get u in touch with amazing pediatricians here. My sister and her kids moved here from Norway a few months ago so IÂ know some really good places for your child and I'd be happy to help you out.
There are also some really good OB/GYN specialists and be happy to get you the important information you need to conceive your second child ( I'm a medical student) I'd also tell you which places and doctors to avoid because, trust me, you have to have the right kind of people here to be comfortable.
As for the dog, I'm sorry to say that we have no dog walkers or a boarding house. But we do have some decent vets. Once in addis, you will probably get a "zebegna" for a really cheap price. The zebegna is someone who will guard your house day and night, answer the door, get sent out to the market, do the gardening, so he should be able to walk the dog able to ungrounded the neighborhood every afternoon.
If u need any information before or after your arrival to Addis, please don't hesitate to a contact me. my sister went through the same thing and I'd like like to make the transition easier for you.