Hi, is there anyone knows where can I put my dog/who can look after her for 4-6 months?

My brother in law sold his house that we are renting, and we need to move by end of the month, so we decided to get the flat for a moment and live there for 6 months while we are looking for a house that take pets but as we all know pets are not allowed on flats. We love our dog, that's why we don't want to sell her but we also need to get a house quickly :(