Invisible electric fences can work with some bullmastiffs. However, they are not a good substitute for an owner's supervision. There are several reasons for that.
Newfoundlands have webbed feet, just like ducks. They also have extremely water-proof fur. Those features, as well as their great strength, loyalty and willingness to learn, make newfies great candidates to work as water rescue dogs.
First of all, most invisible fences work because they detect a signal from a special collar on the bullmastiff. If the collar falls off or the batteries in the collar die without the owner's knowledge then the bullmastiff can easily escape.
The Lundehund is a breed which has lived solely on two islands in the north of Norway. The Lundehund has sever extra toes and paw cushions! That makes it excellent as a climbing dog, bred for rugged terrain. It also has the unusual ability to close its ears.
Another problem is that some bullmastiffs may see something outside the fence line that gets them overly excited, such as a small animal. The bullmastiff might break through the invisible fence line when they are in an extremely excited state and then, after the feeling wears off, they might not want to come back because of the invisible fence.
The bedlington terrier, a large, unique looking breed, is often described as looking like a lamb on a leash. This is probably because it has fur with a wooly texture. As a result of this fur type, the bedlington does not shed.
Believe it or not, the most common problem with electric invisible fences is not trying to keep the individual bullmastiff in. The biggest problem is actually trying to keep other things out. Since the invisible fences work based on an electric impulse from one particular bullmastiff's collar, they do nothing to keep other neighborhood DOGS out of the yard. For that matter, they also don't prevent wildlife, such as raccoons or coyotes, from coming into your bullmastiff's environment either.
The joys of motherhood struck with a vengeance when, in 1984, a great dane became the third dog to join the record holders for largest litter. She had twenty-three puppies. Interestingly, each of the three dogs that hold the record are different breeds.
Some places don't allow standard fences, such as wood or chain link. In those instances, an invisible fence may be the only alternative. If your bullmastiff is going to be supervised in the yard then an invisible fence may be fine. However, there is no substitute for a standard fence when it comes to keeping other animals out. If you can have a standard fence then you should have one. That will protect not only your bullmastiff, but also the rest of the family.
While adult dalmations are covered in cute black spots, dalmation puppies are actually born solid white. Their spots don't show up until they are at least a week old. Sometimes not until they are a month old.
