Share to: It is our eyes that are capable of detecting a portion of the electromagnetic (EM) spectrum called visible light, or the optical spectrum.We describe the different frequencie â¦ s by color, with red being the lowest of the frequencies we can see.t is our eyes that are capable of detecting a portion of the electromagnetic (EM) spectrum called visible light, or the optical spectrum.
Young dogs can react unpredictably to electric dog fences, so understanding a puppy's development is essential to deciding when to start training the animal with the fence and collar. Generally, puppies should not be introduced to electric dog fences until they're at least four or five months old.
Commands show your dog that you're in charge, help you keep your dog's behavior in line, and teach your dog how to be a well-rounded member of your pack. 1  You can start training puppies at 1 to 2 months old and even old dogs can learn new tricks.o do this, you should walk your dog with a standard, 6-foot, non-retractable leash. Hold the leash so that there's only enough room for your dog to stay by your side without being able to move in front of you. 1  As pack leader, you should always be the frontrunner in any walk.