Recently my sister’s dog had a short stay at our house. She’s not even one year old yet and our Monty is an old girl. I knew it would be an interesting time. Sure enough, when Jemma arrived, Monty barked at her for the first hour.
Jemma being the young and energetic one wanted to play with Monty but Monty’s a bit too old and grumpy for that now. She just wants to lie down and/or follow her humans around, not be annoyed by the young pup.
There were a few growls, but overall they managed with each other. Apparently Jemma slept for the whole day after my sister picked her up and I’ll bet Monty did too.