根据短文的内容及首字母提示写出文中所缺单词。

Dogs are excellent pets, friendly and smart. Most dogs are good with people. Some dogs like barking l【小题1】 to warn people that strangers are coming or close. Some bark to e【小题2】 their feelings, such as loneliness and happiness.

Many people wonder how to f【小题3】 their dogs. In fact, dogs eat almost anything! Their m【小题4】 includes meat, rice, biscuits, especially in summer.

Remember that dogs need exercise. Don’t keep your dog inside all day. It will feel b【小题5】. You should take it for a daily walk to cheer it up. Remember, big dogs need longer walks than small ones.