When a female dog or cat is in estrus or in a condition commonly known as "in heat," its owner or custodian shall prevent its contact with another dog or cat, or the attraction of dogs or cats to the premises in which the female dog or cat is kept. Every female cat or dog in heat shall be confined in a building or secure enclosure in such manner that the female dog or cat cannot come into contact with a male dog or cat, except for intentional breeding purposes.