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.
The active ingredient in the flea and tick product NexGard is called afoxolaner, and the active ingredient in Bravecto is called fluralaner. They are similar chemicals, as noted above. Fleas and ticks must attach to the host and commence feeding in order to be exposed to the active substance.