We've always had dogs - big (Newfoundlands) and small (toy poodles). I dog-sit regularly and I am comfortable and reliable with puppies and older dogs or dogs with particular care requirements. I work from home and have a flexible schedule that can generally work around your plans - I’ll let you know in advance of any specific events that might clash with care. Your dog can come and go between the flat and the closed garden. I have a closed garden and access to a private fenced square where dogs can be taken off the lead to run about (if your dog has some level of recall). There are other dogs in the square to socialise if your dog likes doggy company.