Short answer: fostering can be a good option if you love dogs but cannot commit to owning one long term. Check what is involved first.
The RSPCA says fostering gives a dog a safe home while they wait for adoption, and that placements vary from a few weeks to longer. It says you do not need previous experience and that a wide range of homes can be suitable, and each placement is assessed individually.
VCA suggests introducing the foster dog and your own dog outside on a walk, where they are less likely to be excited or territorial. It says to separate dogs when you are away for the first few weeks. See a second dog's first days.
Ask the rescue what support they provide, such as vet care and advice.
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