My wife and I have two dogs, a 1-year-old female and a 2-year-old male. We are planning a road trip for July that will take three weeks. We would really like to bring the dogs with us, but the logistics might not allow it. We have the option to leave the dogs home with my sister-in-law, who lives with us.
However, we are worried that if we leave for that long the dogs will feel like we abandoned them, which might have a lasting impact on our relationship with them. We're especially concerned about our male dog. We got him a few months ago, and we feel like he already has a lot of separation anxiety, probably related to being separated from his original owner.
Will the dogs be able to cope emotionally to us being gone for so long? Will there be long-term effects, or will they just freak out when we get back and then it will be back to normal?