To join multiple search fields together, you use the ampersand character (&). So the search terms all together would be
action=1&pet.Animal=Dog&pet.Breed=malamute&pet.Age=Adult&pet.Size=&pet.Sex=M&location=NJ
pet.Animal=Dog
pet.Breed=malamute
pet.Age=Adult
pet.Size=
pet.Sex=M
location=NJ
To join multiple search fields together, you use the ampersand character (&). So the search terms all together would be
action=1&pet.Animal=Dog&pet.Breed=malamute&pet.Age=Adult&pet.Size=&pet.Sex=M&location=NJ