Yes it is the breeding season for fox and coyote . Do you have any of the female chirps and squeals on your call . Randy Anderson used to have a hand call that made good female in season sounds that work well at this time of the year starting the end part of December and going through March . Primos might have them for sale now as he got in with them . Female coyote have some interesting vocalizations they make when they are looking to mate that will work to call both sexes now , where the male sounds seem not to work for the female and timid younger ones from last year that have survived this long . I noticed that the older female coyote cycled earlier in the season then the younger females thus I would have coyotes pupping starting as early as the first part of April and as late as early June at times . By this time the coyote should star to show breakage on the hips and singing of the guard hairs especially if you have had much snow .