If you would like to try her method, do some searches on the string "
overpowering ambient light with flash", and then read up a bit on the methodology that underpins the technique, and maybe watch some videos on it. It is a visually compelling way to show off subjects!
The thing with overpowering ambient light with flash is that it allows the scene to be shown, to set a location, to set a mood, to show context, but the foreground is lighted by diffused electronic flash, which gives stop-motion capability, so she can show a dog splashing in water, or leaping in the air, and get a nice, crisp Freeze!, and she also gets nice, big, bright catchlights in the eyes of the dogs, which focuses attention on their face/eye areas. Most dogs will have very,very dark, almost colorless eyeballs, so the catchlights really are very helpful!
The background brightness is easily made fairly dim, especially if the shots are done early or late in the day, or even after the sun has gone down. The brightness of the background is controlled by the shutter speed, ISO and f/stop. The FLASH-lighted parts of the scene are only the close-range things. THe flash falls off in intensity very rapidly.
Overpowering ambient light with flash has become a somewhat popular technique over the last few years, in large part because of the development of small, high-capacity, powerful portable sine wave inverter/battery units, which can provide power to studio-type flash units that need 110 volt A.C. current to run. Paul C. Buff's
Vagabond series, and the Innovatronix brand's
Explorer series of inverter/battery units are the most popular brands.
overpowering ambient light with flash - Google Search