In most animals, offspring genders are determined by sex chromosomes at the time of conception. But alligators and other crocodilian species, as well as some turtles and lizards, do not have sex chromosomes. Instead, the sex of the young is determined by the temperature at which the eggs incubate during a critical ...
Nexgard: in a field study of 415 dogs, reactions included vomiting, dry/flaky skin, diarrhea, lethargy, and lack of appetite. These reactions occurred in 4% or less of dogs. Three dogs in the study had a history of seizures; 2 out of 3 experienced one or more seizures after taking Nexgard.
There are two new FDA-approved products on the market this year for dogs: Nexgard and Bravecto. Nexgard is made by Merial, Bravecto is made by Merck, and they are in the same chemical family. These drugs work by causing uncontrolled activity in the nervous system of fleas and ticks, leading to death. Nexgard was released to the market first, followed by Bravecto.