Oh you are going to be sorry you asked!!!
First things first. Deaf really is no different than hearing, except for 3 ways.
1- you talk with your hands, which, honestly,m is easier to train, as you dont have the steps needed to teach the verbal command LOL
2- you cannot let them off the leash in an unfenced area (unless they're like Scout, the most amazing dog ever! who had 100% recall)
3- they are not for the lazy... you cannot just yell to get them out of the garbage... You have to get up and physically pull them out of the can that they're in head first... (yes, Mouse and I have experience with this... LOL) You cannot yell at them when you spot them on the end table about to knock over your rum and eggnog so they can drink it... cuz they have turned into a lush... (and yes, that was Mouse too... She needed AA meetings after her first Christmas...), you cannot yell at them when they are trying their darndest to rip apart your mothers favorite throw pillow... (you guessed it... Mouse again) You have to get up to stop them LOL (or run for it, in the case of the eggnog, except she won, and we had 3 very sticky remote controls LOL)
These 3 items are usually negated by the face that deafies are, more often than not, velcro dogs, and will not let you out of sight. Though the scent hounds (Dachshunds and Beagles) might get themselves on a scent and wander off.... (yes Mouse again). They are fantastic at watching you, and making sure you don't get lost!
Deafies are easy to train, and most people that own deafies feel that training them is easier than training a hearing dog. There are soooo many myths out there about deaf dogs, and most people believe them until shown how easy they are. They really are no different.
Show your mom my vids!
Scout a Deaf Terrier x
And Mouse, a Deaf and limited sight Mini Dachshund (a Beagle would be a DREAM compared to a Dachshund! LOL)
I'm sure A&C will be on here to tell you way more about it, much more eloquently and articulately than I can! LOL
Oh, and I've had 7 dogs in my lifetime... 3 hearing dogs, 1 hearing dog that went deaf at 10 and lived another 4.5 years, 1 born deaf dog, 1 born deaf with mild sight impairment, and 1 born deaf with very limited sight.
I like training the deaf dogs better