The domestic dog is a member of the genus Canis (canines), which forms part of the wolf-like canids, and is the most widely abundant terrestrial carnivore. The dog was the first species to be domesticated and has been selectively bred over millennia for various behaviors, sensory capabilities, and physical attributes.
If you are 100% sure that the chocolate packet touched a part of the floor that definitely became najjs, and that the chocolate packet had moisture on it, then yes it would be najis. This would easy to purify as you could merely put the packet under a tap or just remove the chocolates. If however the floor was dry and so was the packet, then it isn't najis.
May Allah grant you success
Touching any Najis item including dogs or its urine etc does need Ghusl at all. You need to wash the part which touched the Najis item with water, then perform Wudhu and pray. It is a sinful act to delay performing the Prayer till it's time goes. Performing the Qadha namaz will not omit the sin of not praying within the time of the prayer.
You must perform your Namaz within its time under any circumstance.
Yes it is permissible to have a dog as a pet but you must be careful as it is an impure animal (Najis) like pig and you should not let it make your clothes or plates or home items impure (Najis).
If you want to keep a dog as a pet, keeping a dog in your garden to guard your house or garden is allowed as well, and it has no risk of making your home items as impure.
In Islam, the two animals pig and dog are najis. There is no exemption for pig, but in regards to dog, one is able to own a dog if it is used for hunting, a Sheppard dog, or for security. In any of these cases, the dog is still najis and related ahkam stay relevant to it. One can keep a dog, but must observe all aspects of taharah/najasah regarding it.
And Allah knows best.
Animals will be resurrected on the Day of Judgement and many animals will be Paradise like the Boraaq of the Prophet Mohammad (SAWA), the Camel-she of prophet Saleh (AS), the dog of the people of the Cave etc.
If you touch a Najis item e.g. a dog, with wetness, then your touching part of your body or cloth becomes Najis and needs to be washed with water to be Taahir. If you touch a dog or any Najis item with out wetness, then your body of cloth is not Najis.
For health precaution, you are advised not to touch a dog even with dry hands because of the possibility of transfer of microbes or parasites from the dog to your body. You can read on the medical researches published online about the dangerous illnesses which can come to humans from dogs. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5319273/#:~:text=Viral%20infections%20such%20as%20rabies,staphylococcus%20aureus%20are%20the%20most
You would be allowed to have a shepherd dog or a guard dog, and it will be very useful to do so. Keep in mind that a dog is still externally najis, and you must still treat it as such. For example, if the dog is wet, and it touches you, or you touch it, or it licks you, or its hair gets onto you, etc, then you will need to purify yourself.
It would also be important for you not to allow the dog inside your house, or in areas you need to keep tahir, and so on.
And Allah knows best.
There is no shar'i problem in touching, patting or feeding a dog. If your hands, or the dog is wet, then after patting you must wash your hand, because contamination of najasah occurs with contact and wetness.
But if it is dry, then you do not need to do anything.
And Allah knows best.
Thank you for your question. The impurity that transfers from a dog needs to be purified from your clothes and place of prayer before you pray. The presence of a dog in itself is not a problem from a jurisprudential perspective. Perhaps you can confine it in an area in your house which you can purify afterwards if there are any places that you are sure impurities have transferred.
May you always be successful
It is very good to save or help any animal including dog and pig. We have a Hadeeth about a sinner who was entitled to go to hellfire but was saved from hellfire just because he gave water to a thirsty dog. There is also a Hadeeth about a Muslim woman wo will go to hellfire just because of a cat which was locked up by her and left with out food and water. It is always very good to help, feed, give water to any animal.
Touching wet dog or wet pig will make your hand or body Najis, and that will never harm you as it can be purified with water.
We are meant to be the guardians of the earth, showing mercy, especially to innocent animals. We have a duty to care for them. Therefore, even if you became najis after rescuing the animal, this is of lesser importance than showing mercy and humanity towards a sentient being that is suffering. You can easily become tahir again by purifying yourself after touching the animal.
Every rule in Islam is based on our interest and avoiding us any harm. We do not know all the details of the reason but Allah (SWT) and the Prophet (SAWA) know the full reasons. We trust Allah and His Messenger and believe that dog is Najis because it is harmful for us to be in contact with dog.
Many medical scientists confirmed that many dangerous parasites can come to humans from contact with dog.
Journal of Medicine and Life stated : Dogs are a major reservoir for zoonotic infections.Dogs transmit several viral a bacterial diseases to humans.zoonotic diseases can be transmitted to humans by infected saliva aerosols,contaminated urine and feces and direct contact with the dog.