Hi Nikki and welcome to the Forum. Hopefully we can help you with your new Princess.
Princess Parrots are great birds to have as a pet - I have a pair that I hand reared and which are now about 17 years old. They still are a delight to have around the house, happy, playful and mischievous - always regarding life as there to have fun. They get up in the morning excited about the day ahead and go to bed excited about the day they just had. Great birds.
I'm glad that Sunny weaned OK - it is always a risk to take on the hand rearing of a baby when you have no experience in feeding. So much can go wrong with the early indications of a problem subtle and easily missed until too late. However you appear to have avoided that which is great.
Firstly diet - Make sure the seed that you buy a good quality mix. Ideally for a Princess buy a Budgie mix - I'm currently using Golden Cob - and I buy separately Grey-striped Sunflower seed. I then add a small amount of sunflower to the Budgie mix when I change the seed dish - about 5 or 6 sunflower seeds is sufficient. Sunflower seed is very high in fat - think where Sunflower cooking oil comes from - and too much fat is a long term killer to almost all parrots, Princesses included. However sunflower also contains some very important amino acids that may not be in other foods so a little bit will provide those necessary nutrients. Almost all small parrot mixes availalbe contain far too much sunflower as well a safeflower (an unnecessary seed doing more harm than good). Also provide some fresh vegetable and a bit of fruit as well, every day. Seed is actually a poor diet nutritionally and the fresh food will provide many of the missing nutrients. Have a look at the diet information in my article at
scas.org.au/html/pet_parrot_care.html for suggestions of suitable fresh food - and I give around 80% of my vegies as leafy greens - good nutrition without being too high in energy. Pet birds are not getting the exercise they would in the wild so they need a high nutrition and low energy diet.
It is also well worth looking at converting Sunny onto a pellet rather than seed diet - bird pellets are much better nutritionally than seed is, so you will have a healthier pet with a pellet and fresh food diet than a seed and fresh food diet. I myself prefer Roudybush pellets (may be available if you have a Petstock store near you) but most pet shops only sell Vetafarm brand, which, while OK are not as good in my opinion as Roudybush. If you try pellets then get a small size pellet - Mini size in Roudybush is fine. If you do decide to try pellets then let us know and we can explain how to do the conversion. At a young age that is normally very easy. My Princesses get both Roudybush and seed and eat both equally.
Sexing a young Princess isn't always easy but I have bred and raised quite a few and could normally sex by about 4 to 6 months old. As they get older - first moult by 12 months, sexing gets progressively easier and by 24 months the male develops a special shape to the tip of the 3rd flight feather and sexing can be certain even if there was doubt beforehand.
Sunny's behaviour appears typical of a young Princess - they are exploring the world around them, and sometimes do take an experimental nip - if he looks like he is getting excited and a nip is possible, then try to distract him - a matter of learning his body language. His behaviour isn't likely to be aggression, more experimental and perhaps over excitement at time during play. It is hard not to but if he does nip then try not to react at all - by reacting he gets a response and by responding you reinforce the bad behaviour. It can be hard - Princesses don't have a big beak but it still hurts!
Don't expect to be able to cuddle or even give Sunny a scratch - very few Princesses will allow that. My pair will step up and be well behaved but will never allow a scratch. If I try it with the female especially I will get a bite. Those species which allow scratches are those species which do mutual preening of reach other when in a bonded pairing. You never see Princesses preen each other and so they don't take preening from their human mates.
You will find Sunny will become a companion who enjoys being around you - playful at times and other times just happy to sit quietly on a shoulder - mine love to play in my hair when I 'm sitting watching TV - especially if it is wet after a shower. That reminds me, almost all Princesses love to get a shower or at least a good spray of water with a spray bottle - and I will include a photot of a young Princess who is estatic after good soaking.
Finally one last question - is he clipped or does he fly. I am not judgemental of clipping or not clipping - some of my 20 pet birds are flying (Princesses included) and some are by necessity clipped, but I will say that Princesses get a great deal of pleasure from flying, if the house environment is safe for them to do so.
If you have any questions then ask away
cheers,
Mike