you will have an inspection chamber on yours or your next doors property bud you need to locate that first to find out witch why the drains fall ect you you can put the drainage pipe in right way as for rain water its normally runs to a soak away and drains away. The kitchen water is classed as dirty water and would run in to the sewer .So yes you could tap in to that remember when putting a drain pipe in you need to add the right amount off fall so it runs with the pipe and things don't just sit there its not a big job .But that depends on how far away the kennels are from the pipe you want