Hi,
Unfortunately this egg is not going to be viable, even if it was fertile. An egg has to be incubated around the clock, and when the egg is on the floor grate, it can’t stay warm enough because of the air coming from under the egg through the grate. Also, they rarely lay just one egg, so she may have laid others and they broke them or ate them. If you want to try to breed them, you need to get a proper lovebird nest box. This will be a large wood box designed for lovebirds. A homemade nest is not going to work. The nest has to be completely enclosed, and it has to be large enough to hold 4-6 full size chicks plus the parents. The chicks will be nearly as large as the parents before they leave the nest box. You must be feeding the parents a nutritionally balanced diet like pellets – a seed diet does not provide the nutrition they need. They also need leafy greens, veggies, some fruit and an egg food. You can give them everything they need, and they still may not be successful. It’s not easy to breed birds. I would recommend doing more research so you can decide if you really want to try to breed them. Also, you can just let them breed over and over. You have to remove the nest box between each clutch, even if the eggs do not hatch, and rest the pair for 6 months before letting them try again. Forming and laying eggs is hard on the female’s system, so if you let them breed too often, she can end up dying from laying eggs too often.
Thank you for asking Lafeber,
Brenda