Even though all herbivores eat only plants, the diets of different herbivore species vary a great deal. Some herbivores are selective and only consume part of the plant, such as the fruit, leaves, nectar, seeds, sap, roots, or bark.
Dogs come into heat every six months and it lasts for 3 weeks, but typically only bleed in the 2nd week. The amount of blood varies by size of dog, so the larger the dog the more blood is produced. 454 Views Â· 1 Upvote
A normal heat cycle lasts approximately three weeks. In the beginning stages, known as proestrus, a bitch's vulva begins to swell, and you may notice her licking herself more than usual. Male dogs will also begin sniffing her more as her hormones begin to produce a scent that signals she is becoming ready to breed.