We had my Mom's cat put to sleep yesterday. She had pretty advanced cancer and stopped eating. My dad is thinking about getting a couple of kittens from the Humane Society. Is there anything special with regards to getting two kittens? Should they be from the same litter? Both male? Both female? One of each? We also want to get them accustomed to driving 100 miles every few weeks. Any strategies there? Thank you for the help.