Oh, poor Callum! They do get used to a certain routine and as with most of us, they don't like change! It's unfortunate that Callum doesn't respond as we do to how adorable Chester is!
@redandwhite Aw, every pup has it's own personality and sometimes it can take time. Sometimes they'll just have a different type of relationship. That's how it is with my girls. Ruby wants cuddles and Pearl wants a chase. Very different than Ruby's previous housemate who mothered her. And a year and a half into it with Pearl, they have adapted enough to get along fine!