I thought I had 10 cats, didn't know I have a black dog as well! pardon my humor!
The important thing is to identify the cause of depression, I think the main cause of depression is disappointments in life, things not working your way, things like not able to find a good job, or simply unable to find a job, short of money, pressures mounting on you to pay huge bills, owing debts, things that you want but can't afford them, some things are essential and some are not, and then relationship problems, girlfriend dating someone else, or the one you like is not interested in you.
so when you look everywhere you you find that other people all seem very happy everywhere enjoying their lives, yet you are stuck indoors unable to play along in life like other people, due to short of money, or due to lack of self confidence, or even due to some other medical condition that stops you from doing things in life or simply enjoying your life.
You become very Self consciousness and develop new phobias of places, of people, you think people dislike you, but its you who don't make an effort to go out more and mix with them, you think they ignore you, this builds up putting you more down each day, it grows like a leaded weight, buries you deeper and deeper into this rut that never seem to wanting to go away, you think you will never be able to get up again, unless someone you know comes and lifts you up with a crane, persuades you to go along with them together to places, holidays, or anywhere for that matter, with financial help.
but you turn them down, others don't have too much patient to hang around if you are not going to help yourself, so they will then leave you alone, and go alone or take someone else, you will then think they have singled you out, left you behind, so when someone offers any help, take it, be in their accompany, learn and see how they cope in life, how well they are motivated despite having very similar problems in life i.e, lack of money.
by now you have given up on all things and are no longer interested in anything, you tell them sorry mate I am not feeling well, or I am busy, you just go ahead without me, for you every task becomes like climbing a mountain, things that took you hours takes you days to accomplish, your efficiency becomes poor, you can't concentrate on one thing, and start on one thing and leave it half finished and start on another, you spend more time thinking about what you are going to do than actual time doing it, this tires you more mentally, you find your memory is becoming weak, you can't remember things, miss appointments, in the end nothing appears to matter much in life, you are exhausted most of the time, you feel all your energy has drained, and you feel there is nothing that can help you, because no one is going to give you a million pound!
But amazingly, I know someone who is 80 and is very energetic for his age, still looking forward to at least 20 years more from his life, and has such a high positive attitude to life despite two broken hips, and has no money! He lives on £100 a month! except he is under court of protection so he can't spend the rest of his money, as he was spending too much and paying scammers thousands of pounds, so a COP order had to be applied to his bank account! yet his enthusiasm and looking forward to life amazed me completely, he is looking to buy a small Toyota Yarris and has been persuading me to come along but i am avoiding him only because he has no money to pay for it!
However, some anti-depressants can have bad side effects, but there are some mild ones that can help, they help you to concentrate so that you achieve tasks more quickly, have more time to relax and more time to enjoy life. get in touch with your GP.